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    <title>作业1选择</title>
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        ul{
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    <div>
        <input type="checkbox" id="se" name="ra"><label for="se">全选</label>
       <label for="unse">反选</label>
    </div>
   <ul>
       <li><input type="checkbox" id="a" class="qq"><label for="a">1</label></li>
       <li><input type="checkbox" id="b" class="qq"><label for="b">2</label></li>
       <li><input type="checkbox" id="c" class="qq"><label for="c">3</label></li>
       <li><input type="checkbox" id="d" class="qq"><label for="d">4</label></li>
       <li><input type="checkbox" id="e" class="qq"><label for="e">5</label></li>
       <li><input type="checkbox" id="f" class="qq"><label for="f">6</label></li>
       <li><input type="checkbox" id="g" class="qq"><label for="g">7</label></li>
       <li><input type="checkbox" id="h" class="qq"><label for="h">8</label></li>
       <li><input type="checkbox" id="i" class="qq"><label for="i">9</label></li>
       <li><input type="checkbox" id="j" class="qq"><label for="j">10</label></li>
   </ul>
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